left-handed monkey wrench

left-handed monkey wrench

A fictional tool, typically used to trick someone who is new to a field or industry. If you want to mess with the new kid, ask him to go get you a left-handed monkey wrench, then watch him scour the truck for the next hour looking for one.
See also: monkey, wrench
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

left-handed monkey wrench

n. a nonexistent tool. (see also sky hook.) Hand me the left-handed monkey wrench, huh?
See also: monkey, wrench
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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